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Unknown circuit node error

rashan

Oct 6, 2018
1
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Oct 6, 2018
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Hi everyone. I am trying to generate a pwm signal using a behavioral source inside a block. I have everything working except when i run the simulation it shows the following error message.
'X1:b6: Unknown circuit : "nc_01" requested in behavioral source"
I dont know what it means. Can anyone help me resolve this issue?
 

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Nisar-von-Voltenbräackter

May 23, 2018
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May 23, 2018
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Hi everyone. I am trying to generate a pwm signal using a behavioral source inside a block. I have everything working except when i run the simulation it shows the following error message.
'X1:b6: Unknown circuit : "nc_01" requested in behavioral source"
I dont know what it means. Can anyone help me resolve this issue?

Ah, it means you use SPICE. And I know only that it does simulations of circuit performances that you program yourself.

I'd hazard a guess that you haven't formalized linking something of declared identity to something it need be hooked up to, based solely on my sense of what it means to code.

AllAboutCircuits has a number of SPICE simulations and a forum, too. Maybe they could help.
 
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Harald Kapp

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Nov 17, 2011
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The error message alone is not very helpful.
LTSPICE is complaining about an internal node in a subcircuit X1. What is X1 meant to model?
Show us your circuit and upload the .ASC file for inspection, please.
 
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